JPS62217920A - Cutter device of electric mixer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a cutter device for an electric mixer that finely cuts fruits, vegetables, etc. to produce juice.

2. Description of the Related Art Conventionally, the cutter device of this type of electric mixer has a structure as shown in FIGS. 3, 4, and 5.

That is, a small-diameter portion 3 having a small diameter is provided above the bearing portion 2 of the cutter shaft 1, and the lower cutter 7 is placed on a flat portion 4 formed horizontally by the cutter shaft 1 and the small-diameter portion 3. , Next, place a cylindrical spacer 9 on the lower cutter 7 with the small diameter part 3.
The lower cutter 7 and the upper cutter 8 are fixed by passing the cutter 8 through the cutter 8 and placing the cutter 8 on top of the cutter shaft 1. The head 6 formed on the upper part of the small diameter portion 3 of the cutter shaft 1 is swaged into a hemispherical shape.

To prevent rotation of the lower cutter 7 and the upper cutter 8, a slot 5 is formed in the small diameter portion 3 of the cutter shaft 1, and on the other hand, the holes 1o of the lower cutter 7 and the upper cutter 8 are made in the same shape as the slot 5. This was done by invading.

Problems to be Solved by the Invention However, with such a structure, there is a problem in that the upper cutter 8 breaks at the hole 100 portion due to the stress generated when the head 6 is caulked. This is due to the following reason: In other words, when the head 6 is crimped and plastically deformed into a hemispherical shape, not only the head 6 but also the upper part 3' of the small diameter part 3 is deformed slightly laterally, bulging, and the upper cutter 8 Stress is applied so as to force the hole 10 of the hole 10 wider. On the other hand, the cutter for this type of electric mixer uses stainless steel for springs or stainless steel for blades, and hardens it to increase the hardness in order to improve the machinability and durability of the polished cutting edge. It has no toughness and is extremely brittle.

Therefore, if stress is applied to the hole 1Q of the upper cutter 8 as described above, cracks will occur from the corners of the hole 1o due to stress corrosion etc. as time passes.

Therefore, in the present invention, the cutter is fixed to the cutter shaft so that stress is not directly applied to the hole of the upper cutter.

Means for solving the problem and the technical sub-shaft stage of the present invention for solving the above-mentioned problem is to insert a sleeve whose hardness is lower than that of the cutter between the slot of the cutter 9 and at least the hole of the upper cutter. This is how it was done.

For production The effect of this technical means is as follows.

In other words, when the head of the cutter shaft is swaged by force, not only the head but also the upper part of the slotted part deforms and spreads laterally, but the cutter is inserted between the 90% part of the cutter shaft and the hole of the upper cutter. Since the sleeve has lower hardness, the stress that causes the sleeve to deform and expand the cutter hole is alleviated. Therefore, no cracks will occur in the cutter.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIGS. 1 and 2, 11 is a cutter shaft, 14
is a slotted portion formed in the upper neck portion 12 of the cutter shaft 11, and a flat portion 1 formed at the lower end of this slotted portion 14
The lower cutter 18 is located at 3. 16 is a spacer that supports the upper cutter 19, and the spacer 16 and the neck 12
Between the cutters 18 and 19 is a sleeve made of a material with lower hardness than the cutters 18 and 19. 17 is the head located above the neck 12;
After crimping, the cutter 18 is plastically deformed into a spherical shape 17'.
．． 19 is fixed. Note that the lower cutter 18 and the upper cutter 19 are each provided with an oval hole 20° 21 in the center thereof in accordance with the cross-sectional shape of the neck 12° sleeve 16 to prevent rotation. As described above, the cutters 18 and 19 are fixed by plastically deforming the head 17 of the cutter shaft 11, but when the head 17 is plastically deformed, the upper part 12' of the neck 12
The sleeve 1, which has a lower hardness than the upper cutter 19, deforms slightly and bulges laterally and tries to push the hole 21 of the upper cutter 19 wider, but between the neck 12 and the hole 210 of the upper cutter 19, the sleeve 1 whose hardness is lower than that of the upper cutter 19
6, the sleeve 16 deforms along with the deformation of the upper end of the neck portion 12, so that the stress of forcing the hole 21 of the upper cutter 19 to widen is alleviated.

Effects of the Invention As is clear from the above embodiments, the present invention provides a sleeve made of a material with lower hardness than the cutter between the slotted portion of the cutter shaft and at least the hole of the upper cutter. When crimping, the neck spreads laterally and attempts to push the hole in the upper cutter wider, but this sleeve deforms and the stress is alleviated, and the force applied to the hole in the upper cutter becomes small. Therefore, even if the hardness of the cutter is increased in order to obtain good cutting performance and durability, the cutter will not crack even if the toughness becomes poor.

[Brief explanation of drawings]

FIG. 1 is an enlarged longitudinal cross-sectional view of a main part of a cutter device of an electric mixer according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of the cutter device, and FIG. 3 is a longitudinal cross-sectional view of a conventional electric mixer. 4
The figure is an enlarged longitudinal sectional view of the main part of the cutter device, and FIG. 5 is an exploded perspective view of the cutter device. 11...Cutter shaft, 14...Slotted portion, 15...Spacer, 16...S IJ-F, 17'... Head, 18...
- Lower cutter, 19... Upper cutter. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4

Claims (1)

[Claims] Two cutters with a non-circular hole in the center;
A cylindrical spacer located between the two cutters, and a cutter shaft having a slot formed in an upper part passing through the cutter hole and the spacer, the slot of the cutter shaft and at least the upper cutter. A cutter device for an electric mixer, wherein a cylindrical sleeve having a lower hardness than the cutter is inserted between the hole and the cutter shaft, and the head of the cutter shaft is plastically deformed to fix the cutter to the cutter shaft.